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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
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Statement Of Financial Position [Abstract] |  |
Accounts receivable-trade, allowance | $ 315 | $ 327
Inventories, allowance | 65 | 40
Redeemable convertible preferred stock, Series A, discount | 731 | 764
Redeemable convertible preferred stock, par value | $ 0.001 | $ 0.001
Redeemable convertible preferred stock, shares authorized | 1,000,000 | 1,000,000
Redeemable convertible preferred stock, shares issued | 1,000,000 | 1,000,000
Redeemable convertible preferred stock, shares outstanding | 1,000,000 | 1,000,000
Common stock, par value | $ 0.001 | $ 0.001
Common stock, shares authorized | 50,000,000 | 50,000,000
Common stock, shares issued | 8,184,188 | 8,184,188
Common stock, shares outstanding | 8,008,759 | 8,008,759
Treasury stock, shares | 108,976 | 49,863
Retained earnings; accumulated statutory reserves in equity method investments | $ 1,857 | $ 1,857

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